We know that the empeg is soon going to be able work out in which vechile it is due to the radio module id selector. How about an off shoot to this the empeg can have different personnalities for different people a bit like memory seats have beeps, EQ, visuals and a custom playlist for each person.

I know that just now the empeg can easily have a custom playlist for each person but with the above idea you could have the main body of the playlists and a custom playlist for each person but only the person using the empeg would have their playlist visible.